#!/bin/sh
#

F="configure-android"
IS_USING_LLVM="0"

if test "$*" = "--help" -o "$*" = "-h"; then
  echo "$F [--use-ndk-cflags] [OPTIONS]"
  echo ""
  echo "where:"
  echo "  --use-ndk-cflags Optional parameter to use the same compilation flags"
  echo "              	   as the one used by ndk-build. Android NDK r9 or later"   
  echo "                   is required when using this option."
  echo "  OPTIONS     	   Other options that will be passed directly to"
  echo "                   ./aconfigure script. Run ./aconfigure --help"
  echo "                   for more info."
  echo ""
  echo "Environment variables:"
  echo "  ANDROID_NDK_ROOT Specify the directory of Android NDK to use."
  echo "  APP_PLATFORM     Optionally specify the platform level used, e.g."
  echo "                   android-9. By default, configure will use the"
  echo "                   maximum platform level detected."
  echo "  TARGET_ABI       Optionally specify a single target architecture,"
  echo "                   e.g. armeabi-v7a, arm64-v8a, mips, x86. By default, "
  echo "                   the target architecture is arm64-v8a."
  echo "  IGNORE_CFLAGS    Optionally specify compilation flags to be ignored."
  echo "                   Each grepped flag that satisfies the criteria will"
  echo "                   be ignored. Default:"
  echo "                   IGNORE_CFLAGS=\"\-M\|\-f*stack\|\-f*alias\|\-\<g\>\""
  echo "                   Only used when --use-ndk-cflags is specified."
  echo ""
  exit 0
fi

if test "x${ANDROID_NDK_ROOT}" = "x" || test ! -e ${ANDROID_NDK_ROOT}; then
  echo "$F error: ANDROID_NDK_ROOT env var is not specified or invalid"
  exit 0
fi

# The BRE version somehow does not work well on MacOSX
#NDK_VER=`sed -n -e 's/.*Pkg.Revision *= *\([0-9]\+\).*/\1/p' ${ANDROID_NDK_ROOT}/source.properties`
NDK_VER=`sed -n -E 's/^Pkg.Revision *= *([0-9]+).*/\1/p' ${ANDROID_NDK_ROOT}/source.properties`

if test "x$APP_PLATFORM" = "x"; then
  if test -d ${ANDROID_NDK_ROOT}/platforms; then
    APP_PLATFORM=`ls ${ANDROID_NDK_ROOT}/platforms/ | sed 's/android-//' | sort -gr | head -1`
  fi
  if test "x$APP_PLATFORM" != "x"; then
    APP_PLATFORM="android-${APP_PLATFORM}"
  else
    APP_PLATFORM="latest"
  fi
  echo "$F: APP_PLATFORM not specified, using ${APP_PLATFORM}"
fi

if test "x$TARGET_ABI" = "x"; then
  TARGET_ABI="arm64-v8a"
  echo "$F: TARGET_ABI not specified, using ${TARGET_ABI}"
fi

if test "$TARGET_ABI" = "x86_64" || test "$TARGET_ABI" = "mips64"; then       
    USR_LIB="/usr/lib64"
else
    USR_LIB="/usr/lib"
fi


if test "$1" = "--use-ndk-cflags" || [ "${NDK_VER}" -ge "17" ]; then
  if test "$1" = "--use-ndk-cflags"; then
    shift # don't pass this param to main configure script
  fi

  ADD_CFLAGS="0"
  ADD_CXXFLAGS="0"
  ADD_LDFLAGS="0"
  ADD_NDK_TOOLCHAIN="0"
  ADD_NDK_TARGET="0"
  if test "x${IGNORE_CFLAGS}" = "x"; then
    IGNORE_CFLAGS="\-M\|\-f*stack\|\-f*alias\|\-\<g\>\|\-DNDEBUG\|\-O"
  fi
  if test "x${IGNORE_CPPFLAGS}" = "x"; then
    IGNORE_CPPFLAGS="\-M\|\-f*stack\|\-f*alias\|\-\<g\>\|\-DNDEBUG\|\-O\|\-std\="
  fi
  
  if test -f ${ANDROID_NDK_ROOT}/build/ndk-build; then    
    NDK_BUILD=${ANDROID_NDK_ROOT}/build/ndk-build
  else 
    NDK_BUILD=${ANDROID_NDK_ROOT}/ndk-build
  fi

  NDK_OUT=`${NDK_BUILD} -n -C pjsip-apps/src/samples/android_sample APP_PLATFORM=${APP_PLATFORM} APP_ABI=${TARGET_ABI}`
  if test ! "${NDK_OUT}"; then
    echo "$F error: failed to run ndk-build, check ANDROID_NDK_ROOT env var"
    exit 1
  fi

  #echo "====="
  #echo "NDK_OUT : ${NDK_OUT}"
  #echo "====="

  for i in $NDK_OUT; do

    # Parse NDK CXXFLAGS
    if test "${ADD_CXXFLAGS}" = "1"; then
      if test "$i" = "-o"; then
        ADD_CXXFLAGS="0"
        continue
      fi
      if test "$i" = "-c"; then
        continue
      fi
      if test "x`echo $i|grep 'dummy'`" != "x"; then
        continue
      fi
      if test "x`echo $i|grep ${IGNORE_CPPFLAGS}`" != "x"; then
        continue
      fi
      # Check if flag is already in CFLAGS
      ISDUP="0"
      for j in $NDK_CFLAGS; do
        if test "$i" = "$j"; then
	  ISDUP="1"
	  break
	fi
      done
      if test "${ISDUP}" = "1"; then
        continue
      fi
      NDK_CXXFLAGS="${NDK_CXXFLAGS} $i"
      continue
    fi

    # Parse NDK CFLAGS
    if test "${ADD_CFLAGS}" = "1"; then
      if test "$i" = "-c"; then
        ADD_CFLAGS="0"
        continue
      fi
      if test "x`echo $i|grep 'dummy'`" != "x"; then
        continue
      fi
      if test "x`echo $i|grep ${IGNORE_CFLAGS}`" = "x"; then
          if test "${ADD_NDK_TOOLCHAIN}" = "0" -a "x`echo $i|grep '\-gcc-toolchain'`" != "x"; then
            ADD_NDK_TOOLCHAIN="1"
          elif test "${ADD_NDK_TARGET}" = "0" -a "x`echo $i|grep '\-target'`" != "x"; then          
            ADD_NDK_TARGET="1"
          elif test "${ADD_NDK_TOOLCHAIN}" = "1"; then
            NDK_TOOLCHAIN="$i"
            ADD_NDK_TOOLCHAIN="2"
          elif test "${ADD_NDK_TARGET}" = "1"; then
            NDK_TARGET="$i"
            ADD_NDK_TARGET="2"
          fi
          NDK_CFLAGS="${NDK_CFLAGS} $i"
      fi
      continue
    fi

    # Parse NDK LDFLAGS
    if test "${ADD_LDFLAGS}" = "1"; then
      if test "$i" = "-o"; then
        ADD_LDFLAGS="0"
        continue
      fi
      if test "x`echo $i|grep 'dummy'`" != "x"; then
        continue
      fi
      if test "x`echo $i|grep '.so'`" != "x"; then
        continue
      fi
      NDK_LDFLAGS="${NDK_LDFLAGS} $i"
      continue
    fi

    # Find gcc or clang
    if test "x${NDK_CC}" = "x"; then
      if test "x`echo $i | grep 'gcc'`" != "x" -o "x`echo $i | grep 'clang'`" != "x"; then
        NDK_CC=$i
        ADD_CFLAGS="1"
	if test "x`echo ${NDK_CC} | grep 'clang'`" != "x"; then
	  IS_USING_LLVM="1"
	  #echo "---using llvm"
	fi
	continue
      fi
    fi

    # Find g++ or clang++
    if test "x${NDK_CXX}" = "x"; then
      if test "x`echo $i | grep 'g++'`" != "x"; then
        NDK_CXX=$i
        ADD_CXXFLAGS="1"
	continue
      fi
    fi

    # Find linking/LDFLAGS
    if test "x${NDK_LDFLAGS}" = "x"; then
      if test "x`echo $i | grep '\-\<shared\>'`" != "x"; then
        ADD_LDFLAGS="1"
	continue
      fi
    fi

    # Find ar tool
    if test "x${NDK_AR}" = "x" -a "x${NDK_CC}" != "x" -a "x`echo $i|grep '\-\<ar\>'`" != "x"; then
      # In some NDKs, e.g: r17c, gcc/clang and ar have different path
      #if test "$(dirname \"${NDK_CC}\")" = "$(dirname \"${i}\")"; then
        NDK_AR=$i
        #echo "--- found AR=${NDK_AR}"
	continue
      #fi
    fi

    # Find ranlib tool
    if test "x${NDK_RANLIB}" = "x" -a "x${NDK_CC}" != "x" -a "x`echo $i|grep '\-\<ranlib\>'`" != "x"; then
      #if test "$(dirname \"${NDK_CC}\")" = "$(dirname \"${i}\")"; then
        NDK_RANLIB=$i
        #echo "--- found RANLIB=${NDK_RANLIB}"
      #fi
    fi

    # Get STD C++ lib path
    if test "x${STD_CPP_LIB}" = "x"; then
      if test "x`echo $i | grep 'libc++_shared.so'`" != "x"; then
        MY_CONF_TMP=`echo ${i} | sed -e 's/\\\/\\//g' | sed -e 's/\\"//g'`
        if test -e $MY_CONF_TMP; then
          STD_CPP_LIB=$MY_CONF_TMP
        #else
          #echo "--- not good path for libc++_shared.so: ${MY_CONF_TMP}"
        fi
      fi
    fi
  done

  # Get target host from NDK toolchain dir name
  TARGET_HOST=`echo ${NDK_CC} | sed -e 's/.*\/toolchains\/\([^\/]*\).*/\1/'`
  
  # Remove version number suffix (otherwise config.sub will return error, perhaps it just doesn't like the format)
  TARGET_HOST=`echo ${TARGET_HOST} | sed -e 's/\-[0-9\.]*$//'`

  # Get target from '-target' param when TARGET_HOST is 'llvm'
  if test "$TARGET_HOST" = "llvm"; then
    TARGET_HOST=`echo ${NDK_CFLAGS} | sed -e 's/.*-target \([^- ]*\).*/\1/'`
  fi

  # Make sure target host string has 'linux-android' in it
  if test "x`echo ${TARGET_HOST} | grep 'linux-android'`" = "x"; then
    #TARGET_HOST=`echo ${TARGET_HOST} | sed -e 's/\(.*\)\-\([0-9\.]*\)/\1-linux-android-\2/'`
    TARGET_HOST="${TARGET_HOST}-linux-android"
  fi

  # Set the binutils
  if test "x${NDK_TOOLCHAIN}" = "x"; then
    if test "x${NDK_AR}" = "x"; then
      NDK_CC_DIR=$(dirname "${NDK_CC}")
      NDK_AR=`find ${NDK_CC_DIR} -name "*ar" | grep -m 1 -v "gcc"`
    fi
    export LDFLAGS="${LDFLAGS}"
  else
    # find ar and ranlib
    if test "x${NDK_AR}" = "x"; then
      NDK_AR=`find ${NDK_TOOLCHAIN}/bin/ -name "*-ar" | grep -m 1 -v "gcc"`
    fi
    if test "x${NDK_RANLIB}" = "x"; then
      NDK_RANLIB=`find ${NDK_TOOLCHAIN}/bin/ -name "*-ranlib" | grep -m 1 -v "gcc"`
    fi
    export LDFLAGS="${LDFLAGS} -target ${NDK_TARGET} -gcc-toolchain ${NDK_TOOLCHAIN}"
  fi

  if test "x${NDK_RANLIB}" = "x"; then
    NDK_RANLIB="${NDK_AR} s"
  fi

  TC_AR=${NDK_AR}
  TC_RANLIB=${NDK_RANLIB}
  if test "x${TC_AR}" != "x" -a "x${TC_RANLIB}" != "x"; then
    export AR="${TC_AR}"
    export RANLIB="${TC_RANLIB}"
  fi

  export TARGET_ABI="${TARGET_ABI}"
  export CC="${NDK_CC}"
  export CXX="${NDK_CXX}"

  export CPPFLAGS="${CPPFLAGS}"
  export CFLAGS="${NDK_CFLAGS} ${CFLAGS} ${CPPFLAGS}"
  export CXXFLAGS="${NDK_CXXFLAGS} ${CPPFLAGS}"
  export LDFLAGS="${NDK_LDFLAGS} ${LDFLAGS}"
  export LIBS="${LIBS}"

else

  if test "$TARGET_ABI" != "armeabi"; then
    echo "$F error: For targets other than 'armeabi', specify --use-ndk-cflags"
    exit 1
  fi
  
  TARGET_HOST="arm-linux-androideabi"
  
  ANDROID_TC_VER=`ls -d ${ANDROID_NDK_ROOT}/toolchains/${TARGET_HOST}-* | sed 's/clang/0/' | sort -gr | head -1`
  ANDROID_TC=`ls -d ${ANDROID_TC_VER}/prebuilt/* | grep -v gdbserver | head -1`
  if test ! -d ${ANDROID_TC}; then
    echo "$F error: unable to find directory ${ANDROID_TC} in Android NDK"
    exit 1
  fi

  export ANDROID_SYSROOT="${ANDROID_NDK_ROOT}/platforms/${APP_PLATFORM}/arch-arm"
  if test ! -d ${ANDROID_SYSROOT}; then
    echo "$F error: unable to find sysroot dir ${ANDROID_SYSROOT} in Android NDK"
    exit 1
  fi

  export TARGET_ABI="${TARGET_ABI}"
  export CC="${ANDROID_TC}/bin/${TARGET_HOST}-gcc"
  export CXX="${ANDROID_TC}/bin/${TARGET_HOST}-g++"
  export AR="${ANDROID_TC}/bin/${TARGET_HOST}-ar"
  export RANLIB="${ANDROID_TC}/bin/${TARGET_HOST}-ranlib"

  export LDFLAGS="${LDFLAGS} --sysroot=${ANDROID_SYSROOT}"
  export LIBS="${LIBS} -lc -lgcc"
  export CFLAGS="${CFLAGS} --sysroot=${ANDROID_SYSROOT}"
  export CPPFLAGS="${CFLAGS} -fexceptions -frtti"
  export CXXFLAGS="${CXXFLAGS} -shared --sysroot=${ANDROID_SYSROOT} -fexceptions -frtti"

fi

if test "x${CC}" = "x" || test ! -e ${CC}; then
  echo "$F error: compiler not found, please check environment settings (TARGET_ABI, etc)"
  exit 1
fi

# C++ STL
# Note: STL for pjsua2 sample app is specified in pjsip-apps/src/swig/java/android/jni/Application.mk

if test "${IS_USING_LLVM}" = "1"; then
  # llvm
  STDCPP_TC="${ANDROID_NDK_ROOT}/sources/cxx-stl/llvm-libc++"
  #STDCPP_CFLAGS="-I${STDCPP_TC}/include"
  #STDCPP_LIBS="-lc++_static -lc++abi"
  #STDCPP_LIBS="${STDCPP_TC}/libs/${TARGET_ABI}/libc++_shared.so"
  STDCPP_LIBS="${STD_CPP_LIB}"
  #STDCPP_LDFLAGS="-L${STDCPP_TC}/libs/${TARGET_ABI}/"
else
  # gnustl
  STDCPP_TC_VER=`ls -d ${ANDROID_NDK_ROOT}/sources/cxx-stl/gnu-libstdc++/[0-9]* | sort -gr | head -1`
  STDCPP_CFLAGS="-I${STDCPP_TC_VER}/include -I${STDCPP_TC_VER}/libs/${TARGET_ABI}/include"
  STDCPP_LIBS="-lgnustl_static"
  STDCPP_LDFLAGS="-L${STDCPP_TC_VER}/libs/${TARGET_ABI}/"
fi

if test "x$AR_FLAGS" = "x"; then
  AR_FLAGS="rvc"
fi

# stlport
#STDCPP_CFLAGS="-I${ANDROID_NDK_ROOT}/sources/cxx-stl/stlport/stlport"
#STDCPP_LIBS="-lstlport_static -ldl"
#STDCPP_LDFLAGS="-L${ANDROID_NDK_ROOT}/sources/cxx-stl/stlport/libs/${TARGET_ABI}"

export CFLAGS="${CFLAGS}"
export LIBS="${LIBS} ${STDCPP_LIBS}"
export LDFLAGS="${LDFLAGS} ${STDCPP_LDFLAGS}"
export CPPFLAGS="${CPPFLAGS}"
export CXXFLAGS="${CXXFLAGS} ${STDCPP_CFLAGS}"
export STD_CPP_LIB="${STD_CPP_LIB}"
export AR_FLAGS="${AR_FLAGS}"

# Print settings
if test "1" = "1"; then
  echo "$F: calling ./configure with env vars:"
  echo " NDK_TOOLCHAIN = ${NDK_TOOLCHAIN}"
  echo " CC = ${CC}"
  echo " CXX = ${CXX}"
  echo " CFLAGS = ${CFLAGS}"
  echo " CXXFLAGS = ${CXXFLAGS}"
  echo " STD_CPP_LIB = ${STD_CPP_LIB}"
  echo " LDFLAGS = ${LDFLAGS}"
  echo " LIBS = ${LIBS}"
  echo " AR = ${AR}"
  echo " AR_FLAGS = ${AR_FLAGS}"
  echo " RANLIB = ${RANLIB}"
  echo " TARGET_HOST = ${TARGET_HOST}"
  echo " TARGET_ABI = ${TARGET_ABI}"
fi

./configure --host=${TARGET_HOST} $*
